LinearRegression (original) (raw)

• java.lang.Object

• • weka.core.matrix.LinearRegression

• All Implemented Interfaces:
  RevisionHandler

public class LinearRegression
extends java.lang.Object
implements RevisionHandler
Class for performing (ridged) linear regression using Tikhonov regularization.
Version: Revision:9768Revision: 9768 Revision:9768
Author:
Fracpete (fracpete at waikato dot ac dot nz)

• • Constructor Summary

  Constructors

  Constructor and Description
  LinearRegression(Matrix a,Matrix y, double ridge) Performs a (ridged) linear regression.
  LinearRegression(Matrix a,Matrix y, double[] w, double ridge) Performs a weighted (ridged) linear regression.

  • Method Summary

  All Methods Instance Methods Concrete Methods

  Modifier and Type	Method and Description
  double[]	getCoefficients() returns the calculated coefficients
  java.lang.String	getRevision() Returns the revision string.
  java.lang.String	toString() returns the coefficients in a string representation

     * ### Methods inherited from class java.lang.Object  
     `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

• • Constructor Detail

     * #### LinearRegression  
     public LinearRegression([Matrix](../../../weka/core/matrix/Matrix.html "class in weka.core.matrix") a,  
                             [Matrix](../../../weka/core/matrix/Matrix.html "class in weka.core.matrix") y,  
                             double ridge)  
     Performs a (ridged) linear regression.  
     Parameters:  
     `a` \- the matrix to perform the regression on  
     `y` \- the dependent variable vector  
     `ridge` \- the ridge parameter  
     Throws:  
     `java.lang.IllegalArgumentException` \- if not successful  
     * #### LinearRegression  
     public LinearRegression([Matrix](../../../weka/core/matrix/Matrix.html "class in weka.core.matrix") a,  
                             [Matrix](../../../weka/core/matrix/Matrix.html "class in weka.core.matrix") y,  
                             double[] w,  
                             double ridge)  
     Performs a weighted (ridged) linear regression.  
     Parameters:  
     `a` \- the matrix to perform the regression on  
     `y` \- the dependent variable vector  
     `w` \- the array of data point weights  
     `ridge` \- the ridge parameter  
     Throws:  
     `java.lang.IllegalArgumentException` \- if the wrong number of weights were provided.  

  • Method Detail

    * #### getCoefficients  
    public final double[] getCoefficients()  
    returns the calculated coefficients  
    Returns:  
    the coefficients  
    * #### toString  
    public java.lang.String toString()  
    returns the coefficients in a string representation  
    Overrides:  
    `toString` in class `java.lang.Object`  
    * #### getRevision  
    public java.lang.String getRevision()  
    Returns the revision string.  
    Specified by:  
    `[getRevision](../../../weka/core/RevisionHandler.html#getRevision--)` in interface `[RevisionHandler](../../../weka/core/RevisionHandler.html "interface in weka.core")`  
    Returns:  
    the revision